<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>计算器</title>
    <link href="Calculator.css" rel="stylesheet" type="text/css"/>
    <script src="Calculator.js"></script>
</head>
<body>
<div class="content">
    <div class="name">计算器</div>
    <div id="operation">
        <input id="operation_box" />
    </div>
    <div id="enter_button">
        <div>
            <input type="button" class="button" value="c" onclick="get_clear()"/>
            <input type="button" class="button" value="←" onclick="get_back_space()"/>
            <input type="button" class="button" value="*" onclick="get_calculator('*')"/>
            <input type="button" class="button" value="/" onclick="get_calculator('/')"/>
            <input type="button" class="button" value="7" onclick="get_content(7)"/>
            <input type="button" class="button" value="8" onclick="get_content(8)"/>
            <input type="button" class="button" value="9" onclick="get_content(9)"/>
            <input type="button" class="button" value="%" onclick="get_percent_sign()"/>
            <input type="button" class="button" value="4" onclick="get_content(4)"/>
            <input type="button" class="button" value="5" onclick="get_content(5)"/>
            <input type="button" class="button" value="6" onclick="get_content(6)"/>
            <input type="button" class="button" value="-" onclick="get_calculator('-')"/>
        </div>
        <div style="float: left;width:230px;">
            <input type="button" class="button" value="1" onclick="get_content(1)"/>
            <input type="button" class="button" value="2" onclick="get_content(2)"/>
            <input type="button" class="button" value="3" onclick="get_content(3)"/>
            <input type="button" class="button" value="0" onclick="get_content(0)"/>
            <input type="button" class="button" value="." onclick="get_dots('.')"/>
            <input type="button" class="button" value="+" onclick="get_calculator('+')"/>
        </div>
        <div style="float: left;"><input type="button" class="button" value="=" onclick="get_result()" style="width: 58px;height: 95px"/></div>
    </div>
</div>
</body>
</html>